This paper examines systematically which features of a life story (or history) make it good for the subject herself - not aesthetically or morally good, but prudentially good. The tentative narrative calculus presented claims that the prudential narrative value of an event is a function of the extent to which it contributes to her concurrent and non-concurrent goals, the value of those goals, and the degree to which success in reaching the goals is deserved in virtue of exercising agency. The (...) narrative value of a life is a simple sum of the values of individual events that comprise it. I claim that this view best explains and support common intuitions about the significance of the shape of a life. (shrink)